"The Paper" / British Library Agent
Yomiko is absent-minded and awkward until something she cares about is threatened. Then the hesitation disappears. The OVA repeatedly builds its action around that contrast. Her ability is formidable, but what makes Yomiko dangerous is the speed with which she invents a new use for it.
Books are not decoration around her character. Her attempt to protect The Undying Love pulls her into the I-jin crisis in the first place, and her attachment to Nancy eventually matters more to her than Nancy's betrayal. Yomiko begins the OVA chasing a stolen book and ends it trying desperately to save a person.